TLM is currently very fond of the concept of doing things together. Perhaps it's a social developmental thing. She'd rather go on the trampoline with her two cousins ("togeddah!"), than by herself - even if it's safer when it's less crowded. She'd rather go shopping with both parents ("togeddah!"), than with just myself or the boy. And, it seems, she'd rather express emotions in a group situation too.
Take this morning, when TLM was watching Thomas and Friends on my lap while I discreetly read the Sunday paper. She turned her head, frowned in that way which is so cute on a 2 1/2 year old, and said "TLM cross". My first inclination was to ask her what she was cross about. But instead I said, "Are you cross? Would you like Mummy to be cross too? Then we can be cross together". Then I put on my Zoolander frown. She cracked up, and that was the end of the crossness.